... language? or just to vocalise? If the larynx was a very recent development then we would have used some other method of communication. Drums can be used to convey complex messages and instructions. Sign languages can be used cross-culturally. One other thing we can do that chimps cannot, ...

... always been able, for example, to speak. If the larynx was a very recent development then we would have used some other method of communication. Drums can be used to convey complex messages and instructions. Sign languages can be used cross-culturally. One other thing we can do that chimps cannot, ...